8561890

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:498

約数の個数: 32

約数和(自身を含む): 16174080

約数和(自身を除く): 7612190

約数列:

[1, 2, 5, 10, 31, 62, 71, 142, 155, 310, 355, 389, 710, 778, 1945, 2201, 3890, 4402, 11005, 12059, 22010, 24118, 27619, 55238, 60295, 120590, 138095, 276190, 856189, 1712378, 4280945, 8561890]

約数ペア:

[(1, 8561890), (2, 4280945), (5, 1712378), (10, 856189), (31, 276190), (62, 138095), (71, 120590), (142, 60295), (155, 55238), (310, 27619), (355, 24118), (389, 22010), (710, 12059), (778, 11005), (1945, 4402), (2201, 3890)]